Game cheating is not so fair, but sometimes it’s a very joyful thing. When you have hundreds of monsters in the next room, and only five ammos — is it a fair play? So, who can blame you for such a natural wish of having five THOUSANDS of ammos or, better one big bad RPG? There are much more examples — like «not enough money» in strategy games, or «not enough mana», or «not enough experience» and so on, and so forth. Some games have their own cheats built-in by vendors, but it is rare, limited, and in any case, you’ll never know these cheats easily.